roughnecks via Postfix-users:
> Hello,
>
> I would like to ask about opendkim and signing emails with postfix.
> With the following configuration:
>
> ## OPENDKIM ##
> smtpd_milters = inet:127.0.0.1:8891
> non_smtpd_milters =
> milter_protocol = 6
> milter_default_action = accept
>
> DKIM is correct for email sent by my clients, but if I send a message
> from the server's shell, with /usr/sbin/sendmail, I get no signing at
> all (dkim none)
>
> So if I change:
>
> non_smtpd_milters =
>
> with:
>
> non_smtpd_milters = $smtpd_milters
>
> I get dkim for sendmail sent messages, but all the other mail gets *2*
> signatures (this still looks "acceptable" since I see
> Authentication-Results: gmx.net; dkim=pass but I'm not so sure).
If you are using content_filter then Postfix will receive messages
twice. The details to avoid signing twice depend on how your
content_filter is configured (how does it re-inject mail into
Postfix, what options are speicified in main.cf and in master.cf
that affect after-filter processing).
By far the easiest is to stop using content_filter and to use an
rspamd milter or the like do the signing.
Wietse
> So far I never used sendmail, but I'm planning to install a service
> which would make use of it, so I wanted to ask what would be the best
> action to take.
>
> Thanks
>
> --
> roughnecks
>
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